### Test of -j filename
Parsing of --jobs/-j/--max-procs/-P failed
Usage:
parallel [options] [command [arguments]] < list_of_arguments
parallel [options] [command [arguments]] ::: arguments
parallel [options] [command [arguments]] :::: argfile(s)

See 'man parallel' for the options
### Test of -j filename
sleep 0.7
sleep 0.8
sleep 0.9
sleep 0.4
sleep 0.6
### Test of -j filename with file content changing
sleep 3.3
sleep 1
sleep 1
sleep 1
sleep 1
sleep 1
sleep 1
sleep 1.1
sleep 1.2
sleep 1.3
sleep 1.4
sleep 1
sleep 1
sleep 1
sleep 1
sleep 1